I was sparing one time with someone who thought I wasn't fighting up to my potential. So when I threw one of my flashy high kicks, he tried to "motivate" me by kicking me in the nuts, but he ended up nailing me pretty good at the base of my spine (the cocyxx?). It paralyzed me for about a second, and I dropped like a sack of rotten taters.

I thought he was a total prick because of that, but he actually taught me a pretty good lesson. Thanks Dad.